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Description
MRCOOL DIY 4th Gen 2-Zone 18,000 BTU 21 SEER (9K + 9K) Ductless Mini Split AC and Heat Pump with Ceiling Cassettes - 230VMRCOOL DIY Multi Zone 4th Gen 18K BTU Dual Zone Mini Split System with Ceiling Cassettes (9K + 9K) Experience ultimate comfort and control with the MRCOOL DIY 4th Gen Multi Zone 18,000 BTU Dual Zone Mini Split System, featuring two sleek 9K BTU ceiling cassette air handlers. Designed for efficiency, quiet operation, and DIY installation, this system is ideal for heating and cooling two separate rooms without the hassle of hiring a professional HVAC
MRCOOL DIY Multi-Zone 4th Gen 18K BTU Dual Zone Mini Split System with Ceiling Cassettes (9K + 9K)
Experience ultimate comfort and control with the MRCOOL DIY 4th Gen Multi-Zone 18,000 BTU Dual Zone Mini Split System, featuring two sleek 9K BTU ceiling cassette air handlers. Designed for efficiency, quiet operation, and DIY installation, this system is ideal for heating and cooling two separate rooms without the hassle of hiring a professional HVAC technician.
What’s Included
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MRCOOL DIY 4th Gen 18K BTU Multi-Zone Condenser (DIY-MULTI2-18HP230C):
- Delivers powerful heating and cooling with up to 21 SEER efficiency.
- Operates in extreme temperatures, with heating as low as -13°F and cooling up to 122°F.
- Features a durable Gold Fin® condenser to resist corrosion, even in coastal environments.
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Two 9K BTU Ceiling Cassette Air Handlers (DIYCASSETTE09HP-230C25):
- Each unit provides coverage for spaces up to 375 sq. ft..
- Includes versatile operating modes: Cool, Heat, Dry, Fan Only, Sleep, and Auto.
- Low-profile design installs discreetly in ceilings for seamless integration.
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Pre-Charged Quick Connect Line Sets:
- Each line set comes pre-charged with R-410A refrigerant for simple DIY installation.
- Quick Connect technology allows for secure connections using basic tools, saving time and money.
System Highlights
1. DIY Installation Made Easy
This system is designed for anyone to install without professional tools or training. The Quick Connect Line Sets eliminate the need for vacuuming or refrigerant charging, making it accessible for homeowners. Detailed instructions and video guides ensure a smooth setup.
2. Multi-Zone Climate Control
The dual-zone configuration allows for independent heating and cooling in two separate rooms. Each air handler can be controlled individually to suit your preferences, ensuring everyone stays comfortable.
3. Ceiling Cassette Air Handlers
- Discreet and Space-Saving: Flush-mounted design eliminates the need for wall space and blends seamlessly into ceilings.
- Easy Maintenance: The innovative Elevation Function lowers the filter panel, allowing for quick and easy filter cleaning.
- Quiet Operation: With whisper-quiet performance, these units maintain a peaceful environment, ideal for bedrooms, offices, or living rooms.
4. Advanced Technology and Features
- Smartphone Control: Operate the system remotely using the MRCOOL Smart Controller app, compatible with Apple and Android devices.
- Voice Control: Integrates with Amazon Alexa and Google Home for hands-free operation.
- Energy Efficiency: Achieve significant energy savings with a 21 SEER efficiency rating and DC inverter technology.
- Low Ambient Heating and Cooling: Operates in extreme conditions, from -13°F for heating to 122°F for cooling.
Performance and Specifications
Condenser Specifications
- Cooling Capacity: 18,000 BTU
- Heating Capacity: 19,000 BTU
- Efficiency: SEER: 21, EER: 12.5, HSPF: 10.6
- Operating Temperatures: Cooling: 5°F to 122°F | Heating: -13°F to 75.2°F
- Warranty: Includes a 7-year compressor warranty, a 5-year parts warranty, and an optional limited lifetime compressor warranty.
- Dimensions: 35.04"W x 13.46"D x 26.50"H
- Weight: 100.53 lbs
Ceiling Cassette Air Handlers
- Cooling/Heating Capacity: 9,000 BTU each
- Coverage Area: Up to 375 sq. ft. per unit
- Modes: Auto, Cool, Heat, Dry, Fan Only, Sleep
- Dimensions: 50.31"W x 13.19"D x 8.98"H
- Noise Level: Whisper-quiet operation
Smart Features
- Digital Display: Check temperatures, troubleshoot codes, and alerts directly on the air handlers’ displays.
- Customizable Timer Function: Schedule heating or cooling to optimize energy usage.
- Sleep Mode: Automatically adjusts the temperature for energy efficiency and maximum comfort during the night.
- Emergency Cooling Mode: Quickly test cooling functionality or perform maintenance tasks with manual override controls.
Eco-Friendly and Energy-Efficient
- Environmentally Safe Refrigerant: Uses R-410A, a non-ozone-depleting refrigerant.
- Gold Fin® Technology: Protects against corrosion for long-term durability.
- Energy-Saving Design: DC inverter technology reduces energy consumption, saving you money on utility bills.
Why Choose MRCOOL DIY Multi-Zone?
- Cost-Effective DIY Installation: Avoid the high costs of professional HVAC installation.
- Customizable Comfort: Tailor each zone to your preferences with independent controls for every air handler.
- Smart Connectivity: Control your system via smartphone, voice commands, or the included remote control.
- Reliable Performance: With robust warranties and high-quality materials, MRCOOL delivers year-round comfort and peace of mind.
Perfect Applications
- Homes: Ideal for bedrooms, living rooms, or home offices.
- Offices: Create a comfortable work environment in multiple rooms.
- Retail Spaces: Maintain optimal temperatures for customers and employees.
- Renovations: A flexible and efficient solution for retrofitting older buildings.
Order Now
The MRCOOL DIY Multi-Zone 4th Gen 18K BTU Dual Zone Mini Split System is the perfect combination of performance, convenience, and affordability. Enjoy energy-efficient heating and cooling, smart technology, and the freedom of DIY installation.
Order now from MRCOOL DIY Direct, the USA’s most trusted MRCOOL dealer, and start enjoying customized comfort today!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
Nothing Exceptional but Gets the Job Done
Color: Blue, Size: 4.3-Quart, Color: Blue, Size: 4.3-Quart
I’ve owned this 4.5 Qt. Amazon Enameled Cast Iron Dutch Oven for almost two months and have used it three times to date. Upon arrival and at first glance, the gradient blue color is beautiful and super glossy; most importantly, the pot is heavy for its size - as it should be. It looks exactly like the product pictures, with a globular shape than square shape as others. Unfortunately, I also noticed that there was one pin hole and two tiny uneven protrusions on the enamel inside the pot.
I own three other enameled cast iron cookware from two other brands (photos attached for size comparison) and performance wise, this cast iron by Amazon performs equally to them. The pot isn’t exceptional or special but it gets the job done. Other than the pin holes and protrusions, I have no complaints. This isn’t my first rodeo so when heating up the pot and while cooking, I have zero issues.
I am starting the pan off at 4-Stars and will update my review as time progresses, or if I have any major issues with its durability or performance in subsequent months. For the amateur home cook, or for anyone who is new to cast iron cooking, below I’ve included tips that you may find useful while using this or any other enameled cast iron cookware.
================================
Regarding the 3 Photos and 1 video I've Attached:
(Note: all photos were taken with an iPhone under kitchen lights during the evening. Photos have not been edited nor enhanced.)
Photo 1: Size comparison of this Amazon Enameled Cast Iron Dutch Oven compared to three other enameled cast iron cookware that I own from two other brands. From left to right: 7 qt. Tramontina, 4.5 qt. Amazon, 3 qt. Lodge 4 qt. Tramontina.
Photos 2 and 3: fresh produce shown next to 4.5qt Amazon Dutch Oven for color and size contrast.
Video: 4.5 qt. Amazon Enameled Cast Iron Dutch Oven on gas stove over medium heat, with food cooking.
================================
TIPS THAT YOU MAY FIND USEFUL While Using your cast iron dutch oven:
(Note: I included these similar tips in my review of a different enameled cast iron pot from a different brand. My tips can apply to all enameled cast iron cookware)
1. If you find that you have issues with food sticking, it could be that you are not heating up your cast iron pot properly to prevent undue hot spots.
I heat my pot up gradually starting at low, then medium, then high heat. After my pot is very hot is when I add my fat/cooking oil. As the oil is heating up in the pot, I lift it and swirl the oil around to coat all sides of the pot that will come in contact with food.
2. Take into consideration the temperature of the items you are adding to your heated pot. As a general rule for cooking: when ever possible, ensure that the items you are adding to a hot pot are at room temperature, rather than ice cold from the fridge; this will assist with even cooking.
3. Also, get comfortable with adjusting your heat by lowering and raising it based on what you’ve added to the pot. In general, you will need more heat at the beginning of the cooking process, and less heat towards the end. If you cook by recipe, I highly recommend that you read all the steps ahead before starting, so that you become familiarized with all the procedures, allowing you to maneuver accordingly when you start cooking.
4. At the exception of searing meat to achieve a brown crust, deep frying, or when caramelizing onions, you should be stirring your pot (I recommend using a wooden spoon) every few minutes when cooking in cast iron that is placed over high heat. If you are braising on the stove at low heat versus braising in the oven, the frequency of your stirring will need to be adjusted. No matter how you’re cooking though, a watchful eye on the pot plus stirring, should both be a habit not an afterthought.
5. For all cooking vessels in general but especially for cast iron: after cooking, allow your pot to cool down completely before cleaning. NEVER immerse a hot cast iron pot into cold water, nor pour cold dish water into hot pot. You risk not only being scald by dangerous steam, but you also risk weakening the enamel, therefore lessening the durability of your pots over time.
6. This cookware and others like it from Tramontina and Lodge are economical and if used correctly, will perform well for most cooking; if used correctly, they should also last for years. Nonetheless, if you can afford it, authentic enameled cast iron cookware made in France by Le Creuset is the best way to go. Le Creuset is the gold standard in cast iron cookware and their quality is second to none. I definitely recommend this Amazon dutch oven but if you can afford to splurge, Le Creuset's reputation is stellar. As a professional chef, I've used them in high end kitchens and their quality and performance is premier.
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Reviewed in the United States on July 2, 2018
★★★★★ 5
Nice BIG enameled cast iron dutch oven. like LeCreuset but costs less
Color: Blue, Size: 6-Quart
This is nice quality, similar to the far more costly French LeCreuset brand. I was surprised how big this model is, possibly too big for my small kitchen and limited storage space. I store it in the oven. It would be great for baking sourdough boule bread.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Enamel finish
Color: Matte Navy, Size: 6-Quart
This is an amazing pot, got the 6 Qt
for beautiful roast dinners and for baking bread. All comes out evenly baked. Cast Iron is best and it has a nice finish for easy clean up.
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Great Cookware Best purchase
Color: Blue, Size: 6-Quart
I purchased mine back in 2021 and I absolutely love it, cooks the best stew ever
easy wash and cleanup. Also great for deep frying
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Great quality. Easy to clean. Nice appearance.
Color: Red, Size: 4.3-Quart
Solid, heavy pot for cooking and baking. I bought it mainly for making soups, stews and breads. I have only tried soups thus far. The pot cleaned up very easily. The bottom of the pot heated uniformly. Nothing was stuck to the pot when I was simmering on the glass top stove. I have not had the chance to bake yet, but seeing how evenly it held heat while cooking, I am thinking this will be perfect. I bought the red color. It gives a nice pop of color in my kitchen. This pot will probably last me a long time. I would buy one if I needed a replacement, or a gift for someone.
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Reviewed in the United States on November 29, 2025